Design of hybrid BN composite phase change microcapsule suspension and its application in PEM fuel cell cooling

doi:10.3969/j.issn.1674-8484.2024.06.008

Abstract

Abstract:

A latent heat functional fluid based on hybrid boron nitride (BN) composite phase change micro-capsules was designed and prepared to solve the compatibility of thermoelectric properties of proton exchange membrane (PEM) fuel cell cooling medium. The physical properties and heat exchange capacities of a variety of phase change microcapsules and suspension samples were compared through systematic testing and chara-cterization, and the functional fluid was applied to the cooling of PEM fuel cell to analyze the effect of the doping concentration of phase change microcapsules on the output characteristics of the stack. The results show that the incorporation of phase change microcapsules can increase the heat exchange capacity of the base fluid by up to 3.61 times, while the enhancement of the output performance of the PEM fuel cell can be as high as 8.6%. In contrast, the suspension with 20 wt% concentration has the best overall performance, which can control the voltage variation amplitude to 0.02 V under the condition of constant current, and effectively reduce the voltage overshoot and recovery time by 23.1% and 13 s, respectively, under the condition of variable load.

Key words: hybrid boron nitride (BN) composite phase change microcapsules, suspension, proton exchange membrane (PEM) fuel cell, liquid cooling

CLC Number:

TM912

ZHOU Yibin, TANG Aikun, WANG Zhentao, CAI Tao. Design of hybrid BN composite phase change microcapsule suspension and its application in PEM fuel cell cooling[J]. Journal of Automotive Safety and Energy, 2024, 15(6): 866-874.

Figures/Tables 18

References 21

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命名	芯材	壳材
命名	石蜡/ %	多孔氮化硼/ %	片状氮化硼/ %
C1	50	25	25
C2	55	22.5	22.5
C3	60	20	20
C4	65	17.5	17.5
C5	70	15	15
C6	75	12.5	12.5
C7	80	10	10
S1	60	40	0
S2	60	35	5
S3	60	30	10
S4	60	25	15
S5	60	15	25
S6	60	10	30
S7	60	5	35
S8	60	0	40

命名	芯材	壳材
命名	石蜡/ %	多孔氮化硼/ %	片状氮化硼/ %
C1	50	25	25
C2	55	22.5	22.5
C3	60	20	20
C4	65	17.5	17.5
C5	70	15	15
C6	75	12.5	12.5
C7	80	10	10
S1	60	40	0
S2	60	35	5
S3	60	30	10
S4	60	25	15
S5	60	15	25
S6	60	10	30
S7	60	5	35
S8	60	0	40

样品	熔化区间 / ℃	熔化温度 / ℃	熔化焓 / (J·g^-1)	包覆率/ %
石蜡	52.21~68.33	58.62	130.11	-
C1	53.98~69.01	58.84	79.30	60.95
C2	53.87~68.96	58.87	82.40	63.33
C3	53.58~68.61	59.15	94.50	72.63
C4	53.25~67.22	59.26	94.60	72.71
C5	52.97~67.02	59.31	94.70	72.78
C6	52.67~67.43	59.31	94.90	72.94
C7	52.58~67.61	59.44	95.10	73.09
S1	52.66~67.45	58.54	95.50	73.40
S2	52.52~67.33	58.49	95.60	73.48
S3	52.71~67.67	58.65	95.90	73.71
S4	52.39~67.11	58.77	96.30	74.01
S5	52.62~67.75	58.63	95.30	73.25
S6	52.44~67.36	58.76	93.50	71.86
S7	52.52~67.77	58.81	91.80	70.56

样品	熔化区间 / ℃	熔化温度 / ℃	熔化焓 / (J·g^-1)	包覆率/ %
石蜡	52.21~68.33	58.62	130.11	-
C1	53.98~69.01	58.84	79.30	60.95
C2	53.87~68.96	58.87	82.40	63.33
C3	53.58~68.61	59.15	94.50	72.63
C4	53.25~67.22	59.26	94.60	72.71
C5	52.97~67.02	59.31	94.70	72.78
C6	52.67~67.43	59.31	94.90	72.94
C7	52.58~67.61	59.44	95.10	73.09
S1	52.66~67.45	58.54	95.50	73.40
S2	52.52~67.33	58.49	95.60	73.48
S3	52.71~67.67	58.65	95.90	73.71
S4	52.39~67.11	58.77	96.30	74.01
S5	52.62~67.75	58.63	95.30	73.25
S6	52.44~67.36	58.76	93.50	71.86
S7	52.52~67.77	58.81	91.80	70.56